Decided It Was Easier Than Walking With The Boy In The Cold After deciding he'd rather not have to walk the 400 yards to the bus stop in December and January with his grade-school-aged son, Paul Wallich used his technical knowledge to build a camera-carrying quadcopter to follow his son to the bus stop. (www.aero-news.net) 更多...

Good work . Rest is for others to run their imagination wild to find varied applications . Remember , sewing machine was never invented for public use . The inventor could not bear the pain his wife used to bear while sewing ! So he created a machine that could sew without hurting the hands or fingers of his dear wife ! !

Well, at first glance at 400 yards, 1st impression is to think "God, thats sorry" But, the next to last line of the article "He said that a GPS tracker in his son's backpack is supposed to guide the quadcopter, but that sometimes trees and other obstacles get in the way. He also said that battery life is an issue. For those reasons, he said, he usually does the trip to the bus stop in person." Oh well!!!!!